Variable-speed pulley



sept. 20561927... F. Q LARGEN VARI-@LE SBEED PULLEY Fil oct. 25. 192e rPatented Sept. 20,1927. y v

' 'e present invention'pertainsto Vspeed controlmechanismland 1t contemplates the -provision -ofa devlcethrough themedium i of which y. thev 1 speed ci a machine, -p "articu larly fa blower fan `c'a'nfbe 'regulated r'om Yone or more control points by the manipulay tion of la Contactswitch.

Yrlhe invention Vfurther contemplates `'the provisionloi: Imeans whereby the speed of a ,Of'pushesp'giifen theaseend-ing'or descending l' control contact switcln ,-'and'forming partA of thisspec'ilication, iny

Y the portion that forms a suitable mount-V i machine may be in"'creased ai'idfdecreasediby step Vintervals corresponding to the4 number "Otheroh'jects 'of the invention `ivillv befully understood 1 from 'the 4'following `description and 'claims When `the same vfare read infco`nn'ection ivith they drawing accompany-ing Vv"The figure is a *viewT `partly in--sec`tion,- 'illustrating my-nov'elmeans for controlling the speed of a machine. 'Y

The shaft 1 vofa driven machine isadapted` jto receive -a pulley designated by v2 andthe said pulley vis mounted `by "set "screws `or spleen keys in the vdiscretionof those pracl 'i ticing my invention. 'The prima'ry'body ,of the device' Yfor controlli-ngthe speed"V of `the machineV consists ofv afflan'ged'fhub v3 'that is keyed or otherwise secured to the lshaft Y1.A

The outside of Vt-lre'hub` is machined and ormsabearing uponjW'h-ich thebe'lt pulley revolves. The member 8 is provided with ing "for ancil-pu mpfchoke valves, operating magnets, reservoir and current controlling devices hereinafter referred to.

` f The pulley 2 is adapted to carrya belt and consists of a usual hub, spokes and rim upon which a driving or `driven belt operates. The pulley is,mounted upon the hub of the member or primary body 3 to revolve as an idler pulley.`

Mountedlon the pulley 2 and rigidly keyed thereon is a spur gear Wheel 5Which is al- Ways in mesh with a spur gear that acts asa means for imparting motion to the e shaft 7 of anoil pump 8. This oil pump k8 is" mounted upon `the flange 4 of the member3 and receives its motionthrough the spur gear 6 and shaft 7 as illustrated. The oil pump 8 is further adapted to be connected through the suction and discharge openings by means of a pipe QVilluStrated by` dotted lines and the saidy pipe`9 connects the pumpr8 with a choke valve 10 that cona mdium new and are pene'yje f5 einen `afnam are connected fw: are en pump 1senfsegh the elsevier 11;; bai-meen vaive- 11 fume ifo-teas in "fthe casing 12.YV "The pressure oftlie oil being applied to both sides of the valve permits "of "easy rt-ation fythilefunder fliigh pressure. VThe@stein'ofthechke valve is connected 'with a frtchet ivlieel13 *and "Ehegsaidr vihe'el 13 in turn isconnect'edI toaFp'a'Wl aiij'd lever y electric "magnet '-set :114; comprising sets di lmfgnst-S, #theage I have inus'aaiedem valve 10. lThe electroniagiiets :14 `A are 'con- "neeted thronglr suitable-tinte 'toi circular v`cp- -per oifbrass Collecting ings'fembedddin suitable insulation :'"15, that mounted i on electrical :equipment I-pro'vfide ta-casing of "metal 'fothersuitable-material20. The col- VVVleftiiig members "15 may "be applied 'to'I either side y'ofthe' pulley f* idle prille driv shaft 7. The oil choke valve 10 being open .the oil pump 8 1s free to drive the oil from its suction line through the delivery line and Vthe choke valve 10 Without interruption.r To

bring the pulley into operation, a push on the closing button of the remote control switch 18l Will bring the impulse electric magnet 14 into operation communicating motion throughthe armature and pa-Wl lever to the ratchet Wheel 13 closing the choke valve 10 one interval. This will retard the the spur gearwheel 6 to travel slower thereby transmittlng movement to the body 3 using the pump shaft 7 as a fulcrum. It will Voil flow through the pump 8 which will cause revolution ot' the pump 8 and gear G and hence the shaft T will be driving the body Ll at the same speed as the gear 5 and the pulley 2. By interval pushing upon the operating magnet lll the valve l0 will permit lioW ot oil permitting pump 8 to revolve and revolution of the shaft 7 and gear (S will permit the slowing up ot' the member 3 with a similar slowing up of the driven member l until free flowing o'l oil through the valve l0 permits the body 3 to stand still.

The device is extremely simple and comprises but two primary moving parte to wit, the oil pumps and idle pulley.

lhat I claim iszl. In speed control mechanism, the combination of a shaft, a body mounted on the shaft and having a flange formed thereon, an idlepulley mounted on the body, a spur gear mounted on the pulley, an oil pump secured to the flange of the body, a shatt mounted in the flange and adapted to actu-A ate the pump, a gear mounted on the shaft `and in mesh with the tiret named gear, a

pipe connected With the pump, a choke valve eon'imunicating with the pipe, a ratchet wheel mounted on the stem of the choke valve, `magnets arranged above the choke valve and having a pawl and ratchet adapted to intermittently Contact the ratchet and means connected with the magnets for closing and opening the circuits to the magnet.)` from a suitable source oit electric energy.

, Q. In speed control mechanism, the combination ol a shaft, a body mounted on the shaft, a pulley adapted to bear on the body, an oil pump mounted on the body, a sha'lft lor actuating the pump, means for impart ing motion from the pulley to the oil pump, a choke valve arranged on the body and communicating with the oil pump and electrical means interposed between the valve and pump for interrupting the flow of oil through the pump thereby affecting revolution ot the body and lirst named shaft.

ln speed control mechanism, the combination ot' a shaft, a hub mounted on the shalt and having a flange, a pulley bearing on the hub, a spur gear arranged on the hub of the pulley, a spur gear adapted to mesh with the lirst gear, a shal't secured to the second gear, an oil pump aetuable by the shaft, a choke valve connected with the pump and means for electrically operating the choke valve to interrupt the lloiv of oil to the pump whereby interruption ot the rotation o't the pump sli-att will be accomplished. y

l. ln speed control meehauisni, the combi? nation et a shaft, a body mounted on the shaft, an oil pump secured to the shalt, a choke valve communicating with the pump iter effecting operation ot said pump, a shat't arranged in the pump, a gear mounted on the shalt, a gear mounted on and actuable with respect to the lirst shat't and an electric magnet adapted to control operations ot the choke valve and brushes and insulating means communicating with the electric control mechanism.

ln means 'for controlling the speed of a machine, comprising two shafts, a body mounted on one ot the shalts and a pulley loosely mounted on the body, means `lor imparting rotary motion trom one shattto the other and means ilor intermittently con trolling the. speed ot one .li-att with respect to the other and comprising an oil pump, a. pipe connected with the oil pump and a choke valve conununieating.;y With the oil pump through the pipe and electrically controlled to intermittently interrupt the lion' ol oil through the pump.

In testimony whereof I have hereunto set my hand.

FRED o. Landen.

ALTI 

